Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b031a54da36871…

MALICIOUS

PDF

42.4 KB Created: 2020-10-25 14:31:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 4baf2937dac6a8d3a152bc31a099cca1 SHA-1: c1aff123f49a5a0a799c4487585619bf76d81b27 SHA-256: e6b031a54da368712a792a5a85be872cb96d9db3a38d4baf50775006586e7c97
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/aws?keyword=car+starter+motor+wiring+diagram+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371806/normal_5f9069d59dbbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_5f9542583d2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f95500fafcbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403539/normal_5f929b3270262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378852/normal_5f8fd3369f3f7.pdfIn PDF document text
    • https://debasomi.weebly.com/uploads/1/3/0/7/130739769/c90b8947b5.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/2799371.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/risufik_menisemu_nanapudaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006732.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006732.bin)
    • https://s3.amazonaws.com/rizijubovapuk/agilmente_estanislao_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/ielts_vocabulary_4000_academic_words_for_ielts.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/49148752531.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gokipekurepil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/4963/0113/files/annual_procurement_plan_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7322/2294/files/camera_color_picker_android_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7292/5095/files/60686977314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e13c71b-55d5-490c-97db-25802d2da10f/loreruzosule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425ab795-4f6c-4e9b-9fe4-09d13045f476/47433577742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7039da3-0fe4-4e90-b8f9-1c4f60a3b061/72028773167.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5214a3f0-6c47-42df-a8a2-2e2c1f53a961/sunovasokobi.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/bmtc_student_bus_pass_application_form_2019_20.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/83613255272.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/bezekanosapumiganagafe.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/xisolinomenolafo.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/27044093602.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn extracted file (font_00_sfnt_off00006732.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 5328 bytes
SHA-256: 1303089c5a73605a598fdbb3b4819c9e3fdacd288e9c1ad2ef1ab0aad634995f
font_01_sfnt_off0000794f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x794F 10168 bytes
SHA-256: 88a48f45417bebe11c46251cca6d63413526437394c0cdbf8e52fe4bd2dc6085